CN115502398A - Production method of hard alloy super-long thin plate - Google Patents
Production method of hard alloy super-long thin plate Download PDFInfo
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- CN115502398A CN115502398A CN202211339678.3A CN202211339678A CN115502398A CN 115502398 A CN115502398 A CN 115502398A CN 202211339678 A CN202211339678 A CN 202211339678A CN 115502398 A CN115502398 A CN 115502398A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 21
- 239000000956 alloy Substances 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 42
- 239000010935 stainless steel Substances 0.000 claims abstract description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000005245 sintering Methods 0.000 claims abstract description 18
- 238000009694 cold isostatic pressing Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000011049 filling Methods 0.000 claims abstract description 10
- 229910003460 diamond Inorganic materials 0.000 claims description 20
- 239000010432 diamond Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 1
- 238000004663 powder metallurgy Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
Abstract
The invention discloses a method for producing a hard alloy super-long thin plate, which belongs to the technical field of powder metallurgy and comprises the steps of filling a mould, cold isostatic pressing, pre-burning, cutting and sintering, wherein a soft film sleeve is used as an inner layer mould for filling materials, a stainless steel support sleeve ensures the shaping of the materials, a cold isostatic pressing machine is used for carrying out cold isostatic pressing on the materials to obtain a plate blank, the pre-burning treatment removes a green compact forming agent, and the cutting and sintering are carried out on the plate blank.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a production method of a hard alloy ultra-long thin plate.
Background
The hard alloy thin plate is widely applied to various industries such as ceramics, printing machinery, light textile industry, cigarette machinery, cables, shipbuilding, metallurgical machinery, electronics and the like, wherein the hard alloy ultra-long thin plate plays an irreplaceable role in some special fields. The length dimension of the hard alloy ultra-long thin plate product is 500mm, and the length dimension of the product is far beyond that of a common hard alloy thin plate.
The size and weight of a steel die manufactured in the common compression molding process are high due to the particularity of the size of a product, the rigidity of the steel die is high, and the manufacturing is difficult.
Disclosure of Invention
The invention aims to provide a production method of a hard alloy ultra-long thin plate, which solves the problems that the hard alloy ultra-long thin plate is difficult to manufacture by using a common die pressing process method and the quality of the hard alloy ultra-long thin plate is difficult to control in the manufacturing process in the prior art.
The production method of the hard alloy ultra-long sheet comprises the following steps:
s1) filling a mold:
the soft film sleeve is used as an inner layer mould for filling materials, and the soft film sleeve is arranged in a stainless steel supporting sleeve used as an outer layer mould to ensure that the materials are shaped;
s2) cold isostatic pressing:
carrying out cold isostatic pressing on the material by using a cold isostatic press to obtain a plate blank;
s3) pre-burning treatment:
pre-burning the plate blank at 750-810 deg.c to eliminate the pressed blank forming agent;
s4) cutting machining:
performing cutting machining on the plate blank;
s5) sintering treatment:
and (4) transferring the cut plate blank to a sintering process for sintering, and sintering the plate blank into an alloy thin plate.
As a further scheme of the invention: the stainless steel support sleeve is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, and the size of the inner frame of the stainless steel support sleeve is 1-2 mm larger than that of the outer frame of the soft film sleeve.
As a further scheme of the invention: and a plurality of round holes with the diameter of 5mm are uniformly distributed on the stainless steel supporting sleeve.
As a further scheme of the invention: and all edges and corners of the stainless steel support sleeve are subjected to blunting treatment.
As a further scheme of the invention: the soft film sleeve is made of rubber materials with the thickness of 5mm, and the Shore hardness is 48-52.
As a further scheme of the invention: the size of the inner frame of the soft film sleeve is 1.6-1.8 times of the size of the plate blank.
As a further scheme of the invention: one end of the soft membrane sleeving material port is provided with a clamping device which is two stainless steel square strips and is clamped through a clamping bolt, and one side of each stainless steel square strip, which is in contact with the soft membrane sleeve, is milled with a circular arc-shaped clamping groove with the shape being mutually attached, and the surface of the circular arc-shaped clamping groove is pasted with an adhesive tape.
As a further scheme of the invention: the cold isostatic pressing mode is a molding mode with six-direction pressure equal in magnitude, and the pressure value is 180-200 MPa.
As a further scheme of the invention: the pre-sintering temperature is 770-790 ℃.
As a further scheme of the invention: the cutting machining comprises milling a square gauge, cutting and partitioning by a diamond wire saw, and precisely milling to a specified plate blank size, wherein the diamond wire saw cutting is clamped by a magnetic clamping seat and a rubber pad.
Compared with the prior art, the invention has the beneficial effects that:
1. the hard alloy thin plate is pressed by using the cold isostatic pressing mode, compared with a common compression molding method, the cold isostatic pressing method is suitable for manufacturing large-size and heavy-weight plate blanks, and the pressed plate blanks have better density uniformity due to the fact that the pressure of the cold isostatic pressing in all directions is the same and the pressure distribution is uniform. The soft membrane sleeve is matched with the stainless steel supporting sleeve, the materials transmit pressure through the soft membrane sleeve, and the stainless steel supporting sleeve is used for limiting the initial shape of the soft membrane sleeve, so that the materials can form a compact with certain compactness according to the set shape.
2. Cutting the green plate after compacting, wherein the electroplated diamond particles on the diamond wire are easy to block due to the existence of a forming agent in the green plate, so that the cutting efficiency is low or the cutting cannot be carried out; the pressed compact after cutting is thin in thickness and low in strength, and is very easy to break due to clamping force and dead weight of the pressed compact in the cutting process. Therefore, a pre-sintering process is added before cutting, machining and blocking, the pre-sintering temperature is controlled to be 750-810 ℃, a green compact forming agent is removed, the strength of the plate blank is enhanced, the diamond wire saw is prevented from being blocked in the cutting process, the cutting efficiency is improved, the plate blank is ensured to have certain strength, and the fracture in the cutting machining process is avoided.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for producing a cemented carbide ultra-long sheet;
FIG. 2 is a schematic diagram of the mold filling configuration of the present invention;
FIG. 3 is a side view of a diamond wire saw cutting process of the present invention;
fig. 4 is a front view of the cutting process of the diamond wire saw according to the present invention.
In the figure: 1. a soft film sleeve; 2. a stainless steel support sleeve; 3. a clamper; 4. a circular hole; 5. a diamond wire saw; 6. a magnetic holder; 7. and (4) rubber coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a method for producing a cemented carbide ultra-long thin plate includes the following steps:
the method comprises the following steps: and (6) filling the mould.
Referring to fig. 2, the flexible film cover 1 is used as an inner mold for filling materials. The soft film sleeve 1 is made of rubber with the thickness of 5mm, the Shore hardness is 48-52, the soft film sleeve 1 is too hard to facilitate pressure transmission, the compactness and the strength of the plate blank are difficult to ensure, and the edge of the plate blank is easy to fall off due to the fact that the edge of the soft film sleeve 1 which is too hard is not easy to deform during pressure relief; the soft film sleeve 1 is too soft to be shaped and sealed, so that the shape of the pressed plate blank is uneven, and the subsequent cutting processing is influenced.
Furthermore, after the soft film sleeve 1 is filled with materials, the clamping device 3 is used for clamping the materials at the material inlet, so that the materials are prevented from leaking. The clamping device 3 can be clamped by two stainless steel square bars, and two ends of the clamping device are clamped by clamping bolts. One side of two stainless steel square strip contact flexible membrane cover 1 mills the convex draw-in groove that appears laminating each other and convex draw-in groove surface paste adhesive tape, guarantees sealed reliability, avoids soaking among the material pressurization process to lead to the slab to scrap.
In addition, the size of the inner frame of the soft film sleeve 1 is 1.6-1.8 times of the size of the alloy, the coefficient is the shrinkage coefficient of pressing the material into the plate blank, and the soft film sleeve 1 transmits the pressure of a cold isostatic press to act on the material, so that the material can form a compact with certain compactness according to the preset size.
The soft film sleeve 1 is used as an inner layer die and can be placed in an outer layer hard die in advance for material filling. Outer layer mould uses stainless steel to support cover 2, and the material is stereotyped in the laminating of 2 inner walls of stainless steel support cover and mantle cover 1, reduces the follow-up slab surplus of cutting the type processing, improves the utilization ratio of material.
Furthermore, the stainless steel support sleeve 2 is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, so that the rigidity requirement of the template required by material shaping is ensured, and the requirement of the mold to be as light as possible is met. A plurality of round holes 4 with the diameter of 5mm are uniformly arranged on the stainless steel supporting sleeve 2, so that the transmission of cold isostatic pressure is facilitated. Stainless steel supports 2 inside casing sizes of cover 1 frame sizes than the mantle cover and 1 ~ 2mm, makes things convenient for mantle cover 1 to pack into in stainless steel supports cover 2, prevents that mantle cover 1 from leading to the surface to corrugate because of the strong stopper, influences the slab quality, because the surface tension of mantle cover 1 when avoiding loading the material simultaneously for mantle cover 1 laminates and can lead to too big arch when round hole 4, causes to cut type processing cutting allowance big. All sharp-pointed edges and corners are blunted on the stainless steel support sleeve 2, so that the edges and corners are prevented from scratching the soft film sleeve 1 to cause material leakage. The stainless steel support sleeve 2 is welded with a handle, so that the stainless steel support sleeve 2 can be conveniently carried in the pressing process.
Step two: and (3) carrying out cold isostatic pressing on the material by using a cold isostatic press to obtain a slab.
The cold isostatic pressing mode is a molding mode with six-direction pressure equal in magnitude, and the pressure value is 180-200 MPa. Compared with the common compression molding method, the cold isostatic pressing method is suitable for manufacturing slabs with larger size and heavy weight, and the pressed slabs have better density uniformity due to the fact that the pressure of the cold isostatic pressing in all directions is the same and the pressure distribution is uniform.
Step three: pre-burning the plate blank at 750-810 deg.c to eliminate the forming agent.
Because the cold isostatic compaction is large in slab thickness, the slab needs to be partitioned by adopting a cutting type processing mode. If the plate blank is directly cut and blocked by the diamond wire saw 5, a forming agent is added when the plate blank is pressed, and the existence of the forming agent can easily cause the electroplated diamond particles on the diamond wire saw 5 to be blocked, so that the cutting efficiency is low or the cutting cannot be carried out; and the cut thin plate has thin thickness and low strength, and is easy to break due to clamping force and the self weight of the thin plate in the cutting process. Therefore, a pre-sintering process is added before cutting, cutting and blocking, the pre-sintering temperature is controlled to be 750-810 ℃, and the forming agent in the plate blank is removed.
Preferably, the pre-sintering temperature is 770-790 ℃, the removal rate of the forming agent is high at the temperature, and the strength of the plate blank can be enhanced through the pre-sintering temperature. Can guarantee that diamond wire saw 5 cuts the type cutting in-process and is not blockked up, improve cutting efficiency, guarantee again that the slab has certain intensity, avoid cutting the fracture in the type course of working.
Step four: and performing cutting machining on the plate blank, wherein the cutting machining comprises the steps of milling a gauge square, cutting and partitioning by using a diamond wire saw 5 and precisely milling to a specified sheet size.
Referring to fig. 3 and 4, six surfaces of the directly cold isostatic pressed plate blank are uneven, so that the surface of the press-formed plate blank is milled by a diamond single-edge milling cutter to form a square workpiece, and clamping and cutting are convenient. Cutting the blocks by using a diamond wire saw 5, cutting the plate blank with a certain thickness into a plurality of thin plates with the same size, and then turning the cut thin plates to a numerical control milling machine again for surface precision milling to the specified size.
By adopting the diamond wire saw 5 cutting and blocking technology, the diameter of the diamond wire is only 0.8mm, the cutting loss of the material is about 1mm, and the diamond wire has strong wear resistance, so that the material utilization rate and the production efficiency can be ensured. When the diamond wire saw 5 cuts, the plate blank is clamped by the magnetic clamping seat 6 and the rubber 7 is padded, so that the plate blank can be prevented from moving in the cutting process, the rubber 7 can play a role in buffering and increasing friction, the displacement is further prevented, and the plate blank is prevented from being broken due to overlarge clamping force.
Step five: and sintering the thin plate to finally obtain the hard alloy product with the performance.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. The production method of the hard alloy ultra-long sheet is characterized by comprising the following steps:
s1) filling a mold:
the soft film sleeve is used as an inner layer die for filling materials, and the soft film sleeve is arranged in a stainless steel supporting sleeve used as an outer layer die to ensure that the materials are shaped;
s2) cold isostatic pressing:
carrying out cold isostatic pressing on the material by using a cold isostatic press to obtain a plate blank;
s3) pre-burning treatment:
pre-burning the plate blank at 750-810 deg.c to eliminate the pressed blank forming agent;
s4) cutting machining:
cutting the plate blank;
s5) sintering treatment:
and (4) transferring the cut plate blank to a sintering process for sintering, and sintering the plate blank into an alloy thin plate.
2. The method for producing the hard alloy ultra-long sheet according to claim 1, wherein the stainless steel support sleeve is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, and the size of the inner frame of the stainless steel support sleeve is 1-2 mm larger than that of the outer frame of the soft film sleeve.
3. The method for producing the ultra-long cemented carbide sheet according to claim 1 or 2, wherein a plurality of round holes with a diameter of 5mm are uniformly arranged on the stainless steel support sleeve.
4. The method for producing an ultra-long cemented carbide sheet as claimed in claim 3, wherein the stainless steel support sleeve is chamfered at all edges.
5. The method for producing the ultra-long hard alloy sheet as claimed in claim 1, wherein the soft film sleeve is made of rubber with a thickness of 5mm, and the Shore hardness is 48-52.
6. The method for producing an ultra-long cemented carbide sheet as claimed in claim 1 or 5, wherein the inner frame size of the mantle is 1.6 to 1.8 times the size of the slab.
7. The method for producing the ultra-long hard alloy sheet according to claim 1, wherein a clamper is arranged at one end of the soft film sleeving port, the clamper is composed of two stainless steel square bars clamped by a clamping bolt, one side of each stainless steel square bar contacting the soft film sleeve is milled with an arc clamping groove with a shape matched with each other, and a rubber strip is adhered to the surface of the arc clamping groove.
8. The method for producing the ultra-long cemented carbide sheet as claimed in claim 1, wherein the cold isostatic pressing is a six-direction pressure equal in magnitude, and the pressure value is 180 to 200MPa.
9. The method for producing a cemented carbide ultra-long thin plate according to claim 1, wherein the pre-firing temperature is 770 to 790 ℃.
10. The method for producing an ultra-long cemented carbide sheet according to claim 1, wherein the parting process comprises milling to a prescribed slab size, cutting into blocks with a diamond wire saw using a magnetic chuck and clamping with a rubber pad, and precision milling.
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| CN202211339678.3A CN115502398B (en) | 2022-10-27 | 2022-10-27 | Production method of hard alloy ultra-long thin plate |
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Cited By (1)
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| CN116148296A (en) * | 2023-04-19 | 2023-05-23 | 中国科学院过程工程研究所 | Detection method of automatic XRF detection integrated device for metal-containing solid materials |
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| CN115502398B (en) | 2024-03-12 |
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